Improvement in auxiliary air-chambers for stoves



UNITED S'rA'rEs PATENT QFFIGE.

JOHN H. GOODFELLOW, OF TROY, YORK, ASSIGNOR TO SWETT, QUIMBY & PERRY, OF SAME PLACE.

IMPROVEMENT IN AUXILIARV AIR-CHAMBERS FOR STOVES.

Specification forming part of Letters Patent No. 121,506, dated December 5, 1871.

To all whom it may concern:

Be it known that I, Jol-1N H. GoonrELLow, of the city of Troy, in the county of Rensselaer and State of New York, have invented a new and Improved Ash-Box and Auxiliary Air-Chamber; and I do hereby declare the following to be afull, clear, and exact description of the same, reference being had to the accompanying drawings which form and make a part of this my specitit-ation.

Like letters represent and refer to like or corresponding parts.

Figure l is a perspective view of a cookingstove having attached to the front thereof my improved auxiliary air-chamber, more fully hereinafter described and set forth. Fig. 2 is a longitudinal section on the line a' x, Fig. 1. Fig. 3 is a perspective view of my improved ash-box and auxiliary air-chamber detached from the stove', and Fig. 4 is a sectional view of the same, showing the grate and raker therein, more fully hereinafter described. Fig. 5 shows another form of my said auxiliary air-chamber, but substantially the same as that shown at Fig. l.

The nature of my said invention and improvements consist in the construction of an ash-receiving box provided with a hinged bottom, as seen at Fig. 6 of accompanying drawings, for emptying it of its contents, and a bonnet or hinged door at its top, which has a suitable opening for permitting the working of the scraper when the bonnet is closed, said bonnet or door preventing the escape of the ash-dust into the room. It also consists of an oblong rectangular or other-shaped cap or cover, open on the bottoni and side presented to the nre-grate of a cooking-stove, substantially in the manner and for the purposes herein described and set forth.

To enable others skilled in the art to which my invention relates to make and use the same, I will here proceed to describe the construction and operation thereof, which is as follows:

A designates the body of the ash-box, and this may be of any suitable shape, and is provided with an inclined or other-shaped roof. In the top of said box A is seta window, B, Fig. 6, of glass or isinglass, through which the operator can inspect his work. The top of one side of the box (that where the roof reaches the highest point) is left open, which permits it to be placed close up against the stove, so that the ashes may be drawn into it without being scattered upon the iioor. An opening is made in the roof a-t the lowest part of its slope, and over this there is fitted a door, o, Fig. 6, which may be raised or lowered, as desired. The scraper or poker is inserted through this door c and the ashes raked into the box A by means thereof. D is the bottom of the device, and is a hinged door, which can be opened for emptying th e box of its contents.

It will be noticed th at the ash-box is almost entirely closed when in use so that no ash-dust can escape. The device is handy and convenient and can be sold very cheaply.

Another part of my said invention, as illustrated by the accompanying drawings, consists of an oblong, rectangular, or other-shaped cap or cover, open on the bottom and side presented to the {ire-grate. The front or outer side has a slot, E, Figs. 1 and 3, of convenient length, through which the draught is admitted to supply the tire. This slot is also used for the admission of the raker F, Figs. 3 and 4, for the purpose of cleaning the grate of ashes, Sto.; or, if desired, the raker F may pass through said box by means of another opening, as seen at Figs. 3 and 4. The cover or chamber H when applied to a stove or heater, as the case may be, is so iitted as to preclude the admission of any draught except through the heated chamber I, Fig. 2.

By this means a large air-chamber or space is made through which the air must pass before it reaches the tire during such passage it becomes highly heated and rareiied, thereby securing a diminished consumption of fuel, and also furnishin g a largelyincreased radiatingsurface. Experiment has further demonstrated that, when this chamber is applied as above, a much higher temperature of the lower stratums ofthe atmosphere in the room is obtained, thereby securing a more equable temperature with a small amount of fuel through all parts of the room.

Among the other advantages secured by this device are, rst, a more perfect consumption of the gases and vapors generated by combustion, actual trial having proved that, when communication with the chimney or exit-pipe is entirely cut off, no escape of any noxious gases is observable, thereby showin g an almost perfect consumption of the fuel and gases; second, when applied to cooking-stoves of ordinary pattern the plate covering the hearth, and also a part of the front renace of the stove, may be dispensed with, thus obtaining a much larger radiatingsuriace on the bottom ofthe stove, by means of which the temperature of the lower part of the room is rendered more uniform.

This device may be cast with stoves and heaters in the same manner as reseivoirs or other eX- ternal appendages may be attached. If cast in a separate piece or pieces it'may be attached to the grate or ash-pit chamber by means of bolts passing perpendicularly through the chamber I and hearth-plate and secured in the ordinary manner; or the patterns for the stove, range, or heater may be so constructed as to form an internal chamber, exposedrto the heat generated in the iire-box, so that no draught can reach the fuel except by iirst passing through this chamber. It may be constructed either on the sides ofthe lire-box, admitting the draught at one end ci the chamber, and during its passage through the same raretyin g it and passing it into the grate at the opposite end, or by constructing said chamber inmediately under the grate or iire-box, so that the draughtcannot rea ch the rire until after having passed through this chan'iber. The construct-ion and applicatien oi' this device and principle must, necessarily, be as various as there are diii'erent kinds ot' stoves and heaters used.

The form and application ot' this device, as shown by the drawings, are but two of many involving the same principles. By modifications inform and shape this invention may be adapted to all classes ot' heaters, furnaces, and boilers where it is deemed advisable to supply the iire with a heated draught or when the tloating dust or ashes are a nuisance incident to the agitation oi' cleaning ot thel grate.

Having thus described the nature, construction, and operation ot' my said invention, what I claim as new, and desirel to secure by Letters Patent of the United States, is

l. A portable ash-receiving box, A, provided with a hinged bottom, D, and door c, arranged and combined substantially as herein described and set forth.

2. Providing an ash-receiving box such as described with a window, B, for permitting the operator to inspect his work without incurring the liability oi' ash-dust getting into the room, substantially as herein described and set forth.

3. rlhe shield H, orany equivalent therefor, for containing a horizontal opening or slot, E, at or near the top or upper edge thereof, constructed and applied or used in the manner and for the purpose substantially as herein described and set forth.

4. The employment of the auxiliary air-chamber I, constructed, arranged, and operated, in combination with the tire-grate Pand tire-chainber or chamber oi combustion S, in the manner substantially as hereinbet'ore described and set forth.

The arrangement and combination ofthe openin or elongated slot E, or any equivalent thereof, with the auxiliary air-chamber I, by means ot' which atmospheric air is admitted to the lire in the combustion-chamber S so as to promote and facilitate combustion and economy in the vuse of fuel, substantially as hereinbefore described and set forth.

In testimony whereof I have hereunto set my hand this 23d day ot' February, A. D. 1869.

JOHN H. GOUDFELLOW. -Witnesses:

U. D. KnLLUn, N. E. HAGAN. 

